US6949032B2ExpiredUtilityPatentIndex 96

Golf club head having a striking face with improved impact efficiency

Assignee: CALLAWAY GOLF COPriority: Mar 14, 2000Filed: Jan 28, 2004Granted: Sep 27, 2005

Est. expiryMar 14, 2020(expired)· nominal 20-yr term from priority

Inventors:KOSMATKA JOHN B

A63B 2209/00A63B 53/04A63B 53/047A63B 53/0416A63B 53/0466A63B 60/00A63B 53/0408

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Claims

Abstract

A compliant golf club head permits a more efficient impact between a golf ball and the golf club head. Material and geometry constraints of a striking plate of the golf club head can reduce energy losses caused by large strain and strain rate values of the golf ball, these constraints on the striking plate yield a measure of the impact efficiency of the golf club head. Designating a required natural frequency range of the striking plate provides improved impact efficiency between the golf ball the golf club head.

Claims

exact text as granted — not AI-modified

1. A wood-type golf club head comprising:
 a striking plate composed of a titanium alloy material and having a thickness less than 0.200 inch and greater than 0.070 inch, the striking plate having a natural frequency of less than 4500 Hz and greater than 2800 Hz.  
 
   
   
     2. The wood-type golf club head according to  claim 1  wherein the natural frequency is less than 3300 Hz and greater than 2800 Hz. 
   
   
     3. A wood-type golf club head comprising:
 a striking plate disposed in the open front of the body, the striking plate composed of a titanium alloy material and having a thickness less than 0.140 inch, the striking plate having a plurality of scorelines thereon, the striking plate having a natural frequency of less than 8500 Hz and greater than 2800 Hz.  
 
   
   
     4. A wood-type golf club head comprising:
 a body having a striking plate, the striking plate composed of a forged titanium alloy material and having a thickness less than 0.140 inch, the striking plate having a plurality of scorelines thereon, the striking plate having a natural frequency of less than 4500 Hz and greater than 2800 Hz, the golf club head having a volume ranging from 300 cubic centimeters to 450 cubic centimeters.  
 
   
   
     5. The wood-type golf club head according to  claim 4  wherein the natural frequency is less than 3300 Hz and greater than 2800 Hz. 
   
   
     6. The wood-type golf club head according to  claim 4  wherein the volume is 385 cubic centimeters.

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